#include <bits/stdc++.h>
using namespace std;
int main() {
int n,k;
cin>>n;
int arr[n];
for(int i=0;i<n;i++)
{
cin>>k;
arr[i] = k;
}
int i=0,j=n-1;
while(i<j)
{
while(arr[i]!=1)
i++;
while(arr[j]!=0)
j--;
// if(i<j){
swap(arr[i],arr[j]);
i++;j--;
// }
}
for(int i=0;i<n;i++)
{
cout<<arr[i]<<" ";
}
return 0;
}
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